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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 566 · 40 questions
TalentJR

How to do it in your head (Double, double, double): × 2: double once. × 4: double, then double again. × 8: double three times.

NameDateTime takenScore ___ / 40
  1. 1.21 × 8 =
  2. 2.72 × 4 =
  3. 3.49 × 4 =
  4. 4.30 × 8 =
  5. 5.23 × 8 =
  6. 6.26 × 4 =
  7. 7.40 × 4 =
  8. 8.34 × 8 =
  9. 9.30 × 4 =
  10. 10.75 × 4 =
  11. 11.25 × 8 =
  12. 12.40 × 8 =
  13. 13.14 × 8 =
  14. 14.14 × 4 =
  15. 15.51 × 4 =
  16. 16.36 × 8 =
  17. 17.31 × 8 =
  18. 18.15 × 4 =
  19. 19.33 × 4 =
  20. 20.16 × 8 =
  21. 21.28 × 8 =
  22. 22.29 × 4 =
  23. 23.62 × 4 =
  24. 24.19 × 8 =
  25. 25.36 × 4 =
  26. 26.44 × 4 =
  27. 27.56 × 4 =
  28. 28.39 × 8 =
  29. 29.15 × 8 =
  30. 30.12 × 8 =
  31. 31.35 × 8 =
  32. 32.18 × 8 =
  33. 33.46 × 4 =
  34. 34.48 × 4 =
  35. 35.52 × 4 =
  36. 36.50 × 4 =
  37. 37.27 × 4 =
  38. 38.63 × 4 =
  39. 39.38 × 8 =
  40. 40.57 × 4 =

Answer key

  1. 168
  2. 288
  3. 196
  4. 240
  5. 184
  6. 104
  7. 160
  8. 272
  9. 120
  10. 300
  11. 200
  12. 320
  13. 112
  14. 56
  15. 204
  16. 288
  17. 248
  18. 60
  19. 132
  20. 128
  21. 224
  22. 116
  23. 248
  24. 152
  25. 144
  26. 176
  27. 224
  28. 312
  29. 120
  30. 96
  31. 280
  32. 144
  33. 184
  34. 192
  35. 208
  36. 200
  37. 108
  38. 252
  39. 304
  40. 228

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